Pianist Bobo Stenson’s anthology pools a most impressive line-up – including Don Cherry, Charles Lloyd, Tomasz Stanko, and Jan Garbarek – and much deeply-felt playing. In his liner notes, commenting on the broad span of music he has recorded for ECM, Stenson remarks, “Openness and belief in the musicians have always been signatures for this record company.” And these are the guiding principles behind the :rarum series, too.